Romans d'Isonzo (Friulian: Romans dal Lusinç; Slovene: Romanž na Soči) is a comune (municipality) in the Regional decentralization entity of Gorizia in the Italian region of Friuli-Venezia Giulia, located about 40 kilometres (25 mi) northwest of Trieste and about 15 kilometres (9 mi) southwest of Gorizia.

Romans d'Isonzo borders the following municipalities: Gradisca d'Isonzo, Mariano del Friuli, Medea, San Vito al Torre, Tapogliano, Villesse.